CN217401610U - Planetary gear transmission structure - Google Patents
Planetary gear transmission structure Download PDFInfo
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- CN217401610U CN217401610U CN202221282541.4U CN202221282541U CN217401610U CN 217401610 U CN217401610 U CN 217401610U CN 202221282541 U CN202221282541 U CN 202221282541U CN 217401610 U CN217401610 U CN 217401610U
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- planetary gear
- gear
- planetary
- planet carrier
- planet
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Abstract
The utility model relates to the technical field of gears, specifically be a planetary gear transmission structure, it can effectively promote planetary gear driven precision and rigidity, and it includes the ring gear, install the planet carrier through planet carrier support bearing in the ring gear, install two at least planetary gear through the planetary gear axle on the planet carrier, all planetary gear all meshes with sun gear, its characterized in that, planetary gear sets up two-layer just along the axial at least planetary gear axle is at circumferencial direction dislocation arrangement.
Description
Technical Field
The utility model relates to the technical field of gears, specifically be a planetary gear transmission structure.
Background
At present, in the field of high-precision planetary gear transmission, a general structure is as shown in fig. 1 and fig. 2, in fig. 2, 1 is an inner gear ring, 2 is a planetary gear, 3 is a planetary gear shaft, 4 is a planetary gear bearing, 5 is a sun gear, 6 is a planet carrier and also serves as an output shaft, and 7 is a planet carrier support bearing. In the structure, the inner gear ring is fixed, the sun gear is an input gear, the planet carrier outputs, if higher transmission precision and rigidity are realized, more planet gears must be adopted, so that the planet gears have more contact points with the sun gear and the inner gear, but the space distribution of the planet gears on the circumference is limited by the size of the planet gears, and the number of the planet gears cannot be increased at will. The accuracy and rigidity of the transmission is thus limited.
Disclosure of Invention
In order to solve the limited problem of present planetary gear's precision and rigidity, the utility model provides a planetary gear transmission structure, it can effectively promote planetary gear transmission's precision and rigidity.
The technical scheme is as follows: the planetary gear transmission structure comprises an inner gear ring, wherein a planet carrier is arranged in the inner gear ring through a planet carrier supporting bearing, at least two planetary gears are arranged on the planet carrier through planetary gear shafts, and all the planetary gears are meshed with a sun gear.
It is further characterized in that the sum of the thicknesses of each layer of the planetary gears is less than the thickness of the sun gear;
the planet carrier is provided with at least two layers of planet gear installation blocks with different heights.
By adopting the utility model, the planetary gear is divided into at least two layers, so that the limitation of the distribution space in the circumferential direction is broken, the space staggered arrangement mode can be adopted, the number of the planetary gears can be more, and the transmission precision and rigidity are improved; furthermore, at least two layers of planet gear mounting blocks with different heights are arranged on the planet carrier, the sum of the thicknesses of the planet gears on each layer is smaller than that of the sun gear, the axial overhang amount of the planet gear shaft can be reduced by half, and the rigidity and the precision are further improved.
Drawings
FIG. 1 is a schematic diagram of a prior art structure;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a schematic view of the present invention;
fig. 4 is a cross-sectional view of fig. 3.
Detailed Description
Referring to fig. 3 and 4, the planetary gear transmission structure includes an inner gear ring 1, a planet carrier 6 is mounted in the inner gear ring 1 through a planet carrier support bearing 7, at least two planetary gears 2 are mounted on the planet carrier 6 through planetary gear shafts 3, all the planetary gears 2 are meshed with a sun gear 5, planetary gear bearings 4 are arranged between the planetary gears 2 and the planetary gear shafts 3, in this embodiment, the planetary gears 2 are axially arranged in an upper layer and a lower layer, the planetary gear shafts 3 are arranged in a staggered manner in the circumferential direction, and four planetary gear bearings are arranged in each layer. The sum of the thicknesses of each layer of planet gears 2 is less than the thickness of the sun gear 5, i.e. the thickness of a single planet gear 2 is less than half the thickness of the sun gear 5. In order to shorten the overhanging length of the planet gear shaft 3, two layers of planet gear installation blocks 8 with different heights are arranged on the planet carrier 6, the planet gear installation blocks with different heights are matched with the lower layer of planet gears 2, and the planet gear installation blocks with different heights are matched with the upper layer of planet gears 2.
When the planetary gear set is used, the sun gear 5 receives power input and then rotates, the meshed planetary gear 2 revolves around the sun gear 5 and rotates, and the planetary gear 2 revolves to drive the planetary carrier 6 to rotate to form a power output end. The upper part and the lower part are arranged in a layered way, so that the number of the planetary gears 2 which can only be arranged is increased to eight originally, and the precision and the rigidity are greatly improved.
Claims (3)
1. The planetary gear transmission structure comprises an inner gear ring, wherein a planet carrier is arranged in the inner gear ring through a planet carrier supporting bearing, at least two planetary gears are arranged on the planet carrier through planetary gear shafts, and all the planetary gears are meshed with a sun gear.
2. A planetary gearing arrangement according to claim 1, wherein the sum of the thicknesses of the planet gears in each layer is less than the thickness of the sun gear.
3. A planetary gearing arrangement according to claim 1, wherein the planet carrier is provided with at least two layers of planet gear mounting blocks of different heights.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221282541.4U CN217401610U (en) | 2022-05-26 | 2022-05-26 | Planetary gear transmission structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221282541.4U CN217401610U (en) | 2022-05-26 | 2022-05-26 | Planetary gear transmission structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217401610U true CN217401610U (en) | 2022-09-09 |
Family
ID=83146210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221282541.4U Active CN217401610U (en) | 2022-05-26 | 2022-05-26 | Planetary gear transmission structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217401610U (en) |
-
2022
- 2022-05-26 CN CN202221282541.4U patent/CN217401610U/en active Active
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